Ground irrigator



April 30, 1957 T. c. LARsEN 2,790,403

GROUND IRRIGATOR Filed July 27, 1955 5 D 5g. lf of ffz'g. Z-

W Vf y/ Y HHN WQ W jQ- g 2 7% IN V EN TOR.

Fia/1n s C, LAwsE/V FHTa/P/VE YI'.

onor-IND marcaron Thomas C. Larsen, Albany, Calif.- Appncatien nny- 27,1953Seria1fN. 370,302.

2 claims. (ci. 11i-7.1)

This invention relates to ai ground; irrigaton and: has for its mainobject the, provision on at tubularA d'evice adapted* to be thrust into:the: ground forconductingzwaterftoibelow' the ground surface fordischarge .into 'the ground; and which device is provided with means.;vfor automatically' closing'y said device to the flow of waterintot said?ground-v when the ground'isssuicientlyvirrigated Another object of theinvention is; they provision. di?` an.

tubular device adaptedto be tl'n'ust` into thev ground? for` conductingwater to below the surface ot the ground fon4 discharge into the groundand which device isprovided with means actuated hyrthev force requiredto` thrust the same into the ground" for. closing the` device to liow`off: water therethrough during the operation off thrustingtit into thegroundV but which means willi automatically: opent to permit saidow'assoon a'sf saidforce: ceases: andA saiclf nited States Pate-nt Omeans includes a structure: that will' automatically closev With thepresent invention, the wetness ofthe soil de-` termines the time atwhich the control mechanism is actuated for closing the device to flowof water therethrough and into the ground.

Other objects and advantages scription and in' the drawings;

In the drawings Fig.- l is a side elevational: View ofthe present devicesubstantially actual size withthe lowere'n'd being in cross section toshow the working parts.-

Fig. .2A is a reduced size, sideelevational view Ashowing-v acombination or" devices suchas shown in Fig. ,l inv which several ofsuch devices and a-'sprinkler areVv coupled` together, the soil'in whichthe devices, are positioned being` sectioned.

ln` detail, the invention illustrated comprises.. a` pipe or. tube lhaving a tubular cross head 2. rigid therewith., at one end of saidpipe. This cross head and said one end of the pipe communicate at theirjuncture, and an interiforly threaded hose coupling. 3 is provided atthe inlet end of the cross head. The opposite, end is exteriorl'ythreaded for a closure cap 4, or forthe interiorly threaded coupling 5(Fig. 2) of a hose 6 or fora conventionalsprinkler 7;

Rigidly secured withinvthe end" of pipe y1 -that is opposite said crosshead is one end of a member generally designated 8. K '-v I l Thismember S has a passagewayl therethrough'leading to openings 9 that arein the outer pointed-end 10 ots-aid n1embe17--said end being pointed. tofacilitate thrusting the pipe into the ground.

2,. 11 since said section: is@ adjacent to` the pipe, andi the. outersection being. designated 12;. asf it is; outermost relativeI to said:pipe. i

A s1eeve11i4l is press. fittedr into; the: outer endot? pipe 1 thusproviding an annular shoulder 15withinsaid pipe= and which` shoulda-,naswill: appeanlaten, provides a seat for: a valve* element.V Forpr-actical purposes, thelsleevei 14: may be; considered: asi being.integrali withl the" pipe l, although it is rst assembled'.` withtheinner section H beforel its securement`- to the pipe. t

A tubular part` 16;'of 'theesaidi inner section.y llis.r'eci'p'- rocableaxiallyoli pipe 9' within: the. sleeve 1:'4'! and: thisA pant: is a,relatively. close iit within said.v sleeve' except for portions-:ofsaid: sleeveandfsaidpart that ane respectively ofen'largedrestricteddiameters to' provid'efai space for au` expansion. helical spring? 18between! thenrt One end-f of spring ES: reactsf against the:shoulden'-1.9\thatf delins the i end o'rthe: enlarged: inside diameteiportion of sleeve 14 and the. other endf reacts; againstx` the-:shoulderZ0? thatA dene's ther endl of the:- restricted:` outside diameterportiony of thetubular part? 1-63 f v g The'innerL end of part E61within. sleeve 114i and pipe'; 11 isv closed and: is formedi withi a;central.E threaded? recessiior7 the screw 21 that secures a valveelement 22 to said parte` lr6.. Thistvalve element is` withinl pipe 1ibeyond the terminating. end' offsleeve 1?4 andis normally heldon seatf151 by' spring; 132i y l Adjacent'. to said vallveuelem'ent 22, thewalls of tubularA part 'l'dvaie' formed with coaxial openings23 When thevalve element 22iis1seated' on. stat` 125% it will beseen that no'.Wat'ercan how.' throughy rthe openings- 23' and part 16J to the openings9 in the pointed outer end 10.

An'axial extension 2'5t of: part 163 may.' be. in the form of.;tubulanel'e'ment iny oneendfoffwhic'h one end of the part 16v is presstted'rsorth-at: extension 25 and saidpaltI are' rigidlyl held together...A shoulder 26'. is formed by the end of said tubular extension251`thatf is. adjacent tothe nuten end of sleeve. 14,. andV saidyshoulder` 26 and'y endl of sleeve 14` are. spaced apart az suicientdistance to per. mit` the part. 161to'be forced intorthev pipe I'farenough soy that openings: 23-Willbe fully uncovered to p'ermit'ow ofwater. in Vpipel `therethrough' and throught the part E61 andexteusionzZS. 'Y From the above, it. willwbe seenfthatpart. 16.*andfextension 25 form the main parts of the innersectionE 11.-

The; extension Zfpioj'ectsaxially. outwardly of the part `16 a;substantialsdistance. Reciprocable'within. said einl The'member 8, asshown, is in two tubular sections,

one being called the inner section and generally designated Ytension.isithefoutensection;12y that` carries the pointed v s Y errant.yf

At the end. of section l2 thatisf within section 11 is al valve device.:28whi`ch issmerelyf inthe form o'fa'tapered closure forthe inner end ofsaid section,-l 'and directly below saldi device. are coaxial openings.30. A spring' 31 reacting between saidv inner section 1.2 andan axiallyfacing; shoulder 32 Within section 11 and formed by" the end of part16", yieldahly engages theY section 12 in direc` tion outwardly of thesection 1I so that annularl shoulder 33 on said section 12'and justbelow openings '30 will t enga-gelaV 'corresponding` oppositely directedshoulder; formed within section -11 to prevent' section l-Zfromfbei'ngforced' out 'of section' :111.

Any suitable packing ring vSSVmay be around' the-.partv g 16. andagainst shoulder 20 to prevent leakage ofwatet at Y the gap-.betweensleeve litandextensioniZS. I n p Assuming theinlet 'at coupling `3is'c'on'nected with a' supply of. water-'under pressure,itfwill'fbefseen that n" water will beejected frorn-,openingsJ 9 becauseva'lveelet."i'V ment 22A-is seated against theshoulderjpro'vijzlefdbythe.v

end of' sleeve 14. v A 4 Y n Y In operation, withfthe waterimder'prefsfsul 'the operatorj'willrst'engage the ground with end'iloffthe deviceand'thenuterfsectionwih rnov`e=ttgai'use-v Patented Apr.30, 1957 5 6 References Cited inthe le of this patent FOREIGN PATENTSUNITED STATES PATENTS 8,403/ 27 Australia July 20. 1927 445 510 BlackJam 27, 1891 104,953 Switzerland June 2, 1924 1,110,182 Blandin et a1Sept. 8, 1914 OTHER REFERENCES 1,868,235 Jaden July 19, 1932 PopularScience, pg. 22, Septembe'l 1939.

